The Super Earths
01- K-11
02- Migrating Worlds
03- Gliese 581
04- Goldilocks
05- 51 Pegasi
06- Doppler Effect
07- Rhythmic Shift
08- Eccentric Giants
09- Transitters
10- Mu Arae
11- Intermediate World
12- Worlds Observed
13- Extra Solar Earths
14- Migrant Worlds
15- Accretion
16- Core Accretion
17- Disk Erosion
18- Planetary Embryos
19- The Protected Zone
20- Ecosphere
21- Ecosphere II
22- Beta Pictoris
23- Vanquishing Starlight
24- Red Edge / Earth Shine
25- Distant Continents
26- The Age of Stars
   

11 - Intermediate World

 

 

Before the discovery of Gliese 581, these planets were the smallest extrasolar planets yet detected and the first of a new class of rocky terrestrial planets.

The planet orbiting Gliese 876 has a minimum mass of 5.9 Earths and is 7.5 times Earth’s size. The super-Earth orbits 2 million miles from its star - or 18 times closer than mercury orbits our Sun - and completes an orbit every 1.94 days. This super Earth’s surface temperature is probably between 400 and 750 Fahrenheit (200 and 400 Celsius)

It is intermediate between a true terrestrial planet like the Earth and a hot version of the ice giants Uranus and Neptune.

This planet is also important in relation to the alternate formation concept outlined in the later sections of this website.

 
  Alan Lambert 2011